From: Urabe Shyouhei <shyouhei@...>
Date: 2009-07-23T23:01:38+09:00
Subject: [ruby-core:24526] Re: Proposal: savepoints

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Roger Pack wrote:
>> sp =3D ObjectSpace.savepoint
>=20
> You could implement this using fork...I think?

Only when you have a fork system call, yes.

I guess what Yehuda really need is a In-Service Software Update; where a
process image should be refreshed while its in-service sockets to remain =
open.
 What is difficult here is that a socket entity is in kernel, not in that=

process in question.  So you have to whether (1) refresh that process ima=
ge in
a magical way, or (2) spawn a new process and send sockets to it in a mag=
ical
way.  Anyway some magic cannot be avoided, and a fork system call of POSI=
X
semantics is a kind of magic used in (2).  Of course, such a magic is not=

always available on Windows.


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